I'm putting together a new rig, and this is my first time using serial ATA. The OEM hard drive I'm getting doesn't come with any cables, and I wanted to double check if I need to buy anything.This is what my motherboard is shipping with:

What is the cable 3rd from the right, is that splitting a regular power cable into two SATA plugs?Is the yellow cable at the bottom a SATA data cable?